Project Description
1.7380, designated as 10CrMo9-10 (historically 10CrMo910) under EN and equivalent to ASTM A387 Grade 22 / A182 F22, is a 2.25Cr-1Mo low-alloy heat-resistant steel bar engineered for hydrogen service, high-pressure wellhead equipment, and elevated-temperature pressure vessels in the oil, gas, petrochemical, and power generation industries. SHUNFU METAL supplies this grade in bar and forging forms with full NACE MR0175 sour service compliance and EN 10204 3.1/3.2 certification.
Introduction to 1.7380 / 10CrMo9-10
This Cr-Mo alloy steel, standardized under EN 10028-2 and EN 10273, is the premium 2.25%Cr–1%Mo grade for sustained service up to 600°C. With double the chromium and molybdenum content of the 1.7335 / 13CrMo4-5 grade, it delivers superior creep rupture strength, exceptional hydrogen attack resistance, and remarkable thermal stability in the most demanding refinery hydrocracker, catalytic reformer, and sour gas wellhead environments. Widely specified as A387 Gr.22 (plate), A335 P22 (pipe), and A182 F22 / A336 F22 (forgings), 1.7380 is the global benchmark material for hydrogen-rich, high-temperature pressure boundary service. SHUNFU METAL provides this grade with hardness controlled to ≤22 HRC for full NACE MR0175/ISO 15156 sour service compliance.
At SHUNFU METAL, 1.7380 bars are produced via electric arc furnace melting with ladle refining and vacuum degassing, achieving ultra-low impurity levels (S ≤ 0.005%, P ≤ 0.012%). For critical sour service orders, electro-slag remelting (ESR) or VIM+VAR triple-melt routes are available. Bars are hot-rolled on a GFM radial forging machine or open-die forged on a 6,000-ton hydraulic press, then normalized at 930–960°C and tempered at 730–760°C to the specified strength and hardness. Every bar undergoes 100% ultrasonic testing per SEP 1921 Class C/c or EN 10228-3, with full chemical, tensile, impact, hardness, and NDT results documented in an EN 10204 3.1 or 3.2 certificate.
Equivalent Grades of 1.7380
1.7380 / 10CrMo9-10 has recognized equivalents across all major international standards for elevated-temperature pressure equipment. The closest ASTM counterparts are A387 Gr.22 (plate), A335 P22 (seamless tube), and A182 F22 / A336 F22 (forgings).
| Standard | Designation | Remarks |
|---|---|---|
| DIN W-Nr. | 1.7380 | German Werkstoff number |
| EN | 10CrMo9-10 | Pressure vessel & boiler steel |
| ASTM | A387 Gr.22 / A182 F22 / A335 P22 | Plate, forging & tube grades |
| JIS | SCMV4 / SFVAF22B | Cr-Mo alloy steel plate & tube |
| GOST | 10Х2М / 10Kh2M | Russian Cr-Mo heat-resistant grade |
| GB | 12Cr2Mo1R | Chinese pressure vessel steel |
| UNS | K21590 / K21390 | Unified Numbering System |
Oil & Gas & Petrochemical Applications
1.7380 / F22 steel bars are the industry standard for high-temperature, high-pressure, and hydrogen-rich service components in upstream wellhead equipment, midstream processing, and downstream refinery units. With hardness controlled to ≤22 HRC for NACE MR0175 sour service, this grade is safe for H₂S-containing environments.
Sour gas & HPHT wellheads
Subsea & surface wellhead
HP gate, globe & check valves
Hot hydrogen service vessels
Furnace tubes & headers
HP & IP turbine shells
Superheater & reheater outlets
Weld neck, blind, RTJ flanges
Fixed & floating head HXs
Weld overlay for corrosion
Steam generator pressure shells
Main steam & hot reheat lines
Supply Range — 1.7380 Steel Bar
SHUNFU METAL maintains comprehensive inventory of 1.7380 / F22 bars in normalized and tempered condition under ISO 9001 & AS9100-certified quality management. Production on a 6,000-ton hydraulic press and GFM radial forging machine ensures exceptional internal soundness. All products ship with full EN 10204 3.1 or 3.2 mill certificates. Third-party inspection by SGS, TUV, DNV, or Lloyd’s Register is supported.
| Form | Process | Diameter / Thickness | Width | Length |
|---|---|---|---|---|
| Round Bar | Hot-Rolled | ⌀10–500 mm | — | 3000–12000 mm |
| Round Bar | Forged | ⌀100–1200 mm | — | 2000–8000 mm |
| Flat Bar | Hot-Rolled | 3–150 mm | 20–610 mm | 3000–12000 mm |
| Flat Bar / Block | Forged | 50–800 mm | 100–1500 mm | 2000–6000 mm |
Non-standard sizes, stepped shafts, forged rings (OD 200–2000 mm), discs, tube sheets, custom closed-die forgings, and blocks are available upon inquiry. SHUNFU METAL also offers rough machining, saw cutting, peeled/ground surface finishes (Ra 0.8–6.3 µm), and full heat treatment services per customer specification.
Chemical Composition of 1.7380
The chemical composition conforms to EN 10028-2 10CrMo9-10, with tighter impurity controls applied for NACE MR0175 sour service compliance. The 2.25% Cr – 1% Mo alloy design provides superior hydrogen attack resistance, exceptional creep strength, and reliable oxidation resistance at sustained temperatures up to 600°C, making 1.7380 the premier choice for hydrocracker reactors, catalytic reformers, and HPHT wellhead equipment worldwide.
| C | Si | Mn | P | S | Cr | Mo |
|---|---|---|---|---|---|---|
| 0.08–0.14 | ≤0.50 | 0.40–0.80 | ≤0.020 | ≤0.010 | 2.00–2.50 | 0.90–1.10 |
Values in weight percent (wt%). Iron (Fe) balance. Nitrogen ≤ 0.012%; Copper ≤ 0.30%. For sour service per NACE MR0175, SHUNFU METAL restricts sulfur to ≤0.005% and phosphorus to ≤0.012%. ASTM A182 F22 specification allows broader Mn (0.30–0.60%) and slightly wider Mo (0.87–1.13%). All heats are verified by optical emission spectrometry (OES).
Mechanical Properties of 1.7380 / 10CrMo9-10
In the normalized and tempered (+NT) condition per EN 10028-2, 1.7380 delivers high strength, excellent ductility, and reliable impact toughness. For sections >60 mm, +NT or quenched and tempered (+QT) delivery conditions are available. SHUNFU METAL applies controlled normalizing at 930–960°C with air cooling and tempering at 730–760°C to achieve the specified properties. For NACE MR0175 sour service, hardness is restricted to ≤22 HRC (~237 HBW) verified on every bar.
| Property | ≤16 mm | 16–60 mm | 60–100 mm | 100–150 mm | 150–250 mm |
|---|---|---|---|---|---|
| Tensile Strength (MPa) | 480–630 | 470–620 | 470–620 | 460–610 | 450–600 |
| Yield Strength (min, MPa) | 310 | 290 | 280 | 260 | 250 |
| Elongation (min, %) | 18 | 18 | 17 | 17 | 17 |
| Impact KV (min, J @ 20°C) | 31 | 31 | 27 | 27 | 27 |
| Hardness (HBW, max) | 237 | 237 | 237 | 237 | 237 |
| Creep Strength (MPa @ 500°C / 100,000 h) | 166 (Rm/100000); Rz/100000 = 221 | ||||
| Heat Treatment | Normalized 930–960°C + Tempered 730–760°C | ||||
For quenched and tempered (+QT) delivery (typically for sections >150 mm): tensile 515–690 MPa, yield ≥310 MPa, elongation ≥20%, hardness 156–207 HB. NACE MR0175 compliance (≤22 HRC) is achievable in both +NT and +QT conditions. SHUNFU METAL performs tensile, impact, and hardness testing on each heat treatment lot, with elevated-temperature tensile and creep data available upon request.